/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 10:46:33,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 10:46:33,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 10:46:33,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 10:46:33,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:46:33,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:46:33,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:46:33,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:46:33,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:46:33,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:46:33,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:46:33,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:46:33,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:46:33,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:46:33,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:46:33,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:46:33,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:46:33,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:46:33,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:46:33,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:46:33,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:46:33,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:46:33,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:46:33,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:46:33,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 10:46:33,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:46:33,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:46:33,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:46:33,420 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 10:46:33,435 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:46:33,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:46:33,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:46:33,437 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:46:33,437 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:46:33,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:46:33,437 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:46:33,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:46:33,438 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:46:33,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:46:33,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:46:33,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:46:33,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:46:33,439 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:46:33,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:46:33,439 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:46:33,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:46:33,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:46:33,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:46:33,440 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:46:33,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:46:33,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:46:33,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:46:33,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:46:33,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:46:33,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:46:33,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:33,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:46:33,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:46:33,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 10:46:33,732 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:46:33,745 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:46:33,748 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:46:33,750 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:46:33,750 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:46:33,751 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-07-20 10:46:33,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56c641e58/0a8fb350b1704b1d95069aa07ffc12fd/FLAGdac73699b [2020-07-20 10:46:34,308 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:46:34,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-07-20 10:46:34,316 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56c641e58/0a8fb350b1704b1d95069aa07ffc12fd/FLAGdac73699b [2020-07-20 10:46:34,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56c641e58/0a8fb350b1704b1d95069aa07ffc12fd [2020-07-20 10:46:34,653 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:46:34,656 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:46:34,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:46:34,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:46:34,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:46:34,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:46:34" (1/1) ... [2020-07-20 10:46:34,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3723a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:34, skipping insertion in model container [2020-07-20 10:46:34,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:46:34" (1/1) ... [2020-07-20 10:46:34,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:46:34,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:46:34,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:46:34,901 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:46:34,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:46:34,933 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:46:34,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:34 WrapperNode [2020-07-20 10:46:34,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:46:34,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:46:34,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:46:34,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:46:34,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:34" (1/1) ... [2020-07-20 10:46:34,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:34" (1/1) ... [2020-07-20 10:46:35,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:34" (1/1) ... [2020-07-20 10:46:35,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:34" (1/1) ... [2020-07-20 10:46:35,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:34" (1/1) ... [2020-07-20 10:46:35,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:34" (1/1) ... [2020-07-20 10:46:35,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:34" (1/1) ... [2020-07-20 10:46:35,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:46:35,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:46:35,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:46:35,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:46:35,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:46:35,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:46:35,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:46:35,119 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-20 10:46:35,119 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:46:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:46:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 10:46:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-20 10:46:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:46:35,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:46:35,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:46:35,297 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:46:35,298 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 10:46:35,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:46:35 BoogieIcfgContainer [2020-07-20 10:46:35,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:46:35,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:46:35,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:46:35,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:46:35,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:46:34" (1/3) ... [2020-07-20 10:46:35,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b65cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:46:35, skipping insertion in model container [2020-07-20 10:46:35,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:34" (2/3) ... [2020-07-20 10:46:35,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b65cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:46:35, skipping insertion in model container [2020-07-20 10:46:35,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:46:35" (3/3) ... [2020-07-20 10:46:35,311 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2020-07-20 10:46:35,322 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:46:35,329 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:46:35,345 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:46:35,378 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:46:35,378 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:46:35,379 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:46:35,379 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:46:35,379 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:46:35,379 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:46:35,379 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:46:35,379 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:46:35,404 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-20 10:46:35,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 10:46:35,412 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:35,414 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:35,414 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:35,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:35,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2020-07-20 10:46:35,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:35,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009629035] [2020-07-20 10:46:35,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:35,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 10:46:35,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 10:46:35,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:46:35,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009629035] [2020-07-20 10:46:35,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:46:35,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 10:46:35,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282025032] [2020-07-20 10:46:35,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 10:46:35,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:35,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 10:46:35,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 10:46:35,681 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2020-07-20 10:46:35,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:35,848 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-07-20 10:46:35,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 10:46:35,850 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-07-20 10:46:35,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:35,860 INFO L225 Difference]: With dead ends: 36 [2020-07-20 10:46:35,860 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 10:46:35,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 10:46:35,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 10:46:35,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-20 10:46:35,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 10:46:35,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-20 10:46:35,913 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-07-20 10:46:35,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:35,914 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-20 10:46:35,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 10:46:35,915 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-20 10:46:35,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 10:46:35,917 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:35,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:36,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:36,131 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:36,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:36,133 INFO L82 PathProgramCache]: Analyzing trace with hash -509871596, now seen corresponding path program 1 times [2020-07-20 10:46:36,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:36,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313457935] [2020-07-20 10:46:36,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:36,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 10:46:36,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 10:46:36,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:46:36,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313457935] [2020-07-20 10:46:36,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:46:36,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 10:46:36,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480388670] [2020-07-20 10:46:36,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 10:46:36,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:36,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 10:46:36,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 10:46:36,221 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2020-07-20 10:46:36,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:36,328 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-07-20 10:46:36,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 10:46:36,329 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-20 10:46:36,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:36,331 INFO L225 Difference]: With dead ends: 28 [2020-07-20 10:46:36,331 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 10:46:36,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 10:46:36,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 10:46:36,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-07-20 10:46:36,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 10:46:36,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-20 10:46:36,340 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-07-20 10:46:36,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:36,340 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-20 10:46:36,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 10:46:36,341 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-20 10:46:36,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 10:46:36,342 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:36,342 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:36,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:36,556 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:36,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:36,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2020-07-20 10:46:36,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:36,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779817269] [2020-07-20 10:46:36,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:36,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 10:46:36,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 10:46:36,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:37,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:37,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:37,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 10:46:37,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779817269] [2020-07-20 10:46:37,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:37,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2020-07-20 10:46:37,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229837575] [2020-07-20 10:46:37,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 10:46:37,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:37,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 10:46:37,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-07-20 10:46:37,232 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 17 states. [2020-07-20 10:46:37,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:37,456 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2020-07-20 10:46:37,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 10:46:37,457 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-07-20 10:46:37,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:37,459 INFO L225 Difference]: With dead ends: 34 [2020-07-20 10:46:37,459 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 10:46:37,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-07-20 10:46:37,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 10:46:37,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-20 10:46:37,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 10:46:37,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-07-20 10:46:37,469 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 27 [2020-07-20 10:46:37,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:37,470 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-07-20 10:46:37,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 10:46:37,470 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-07-20 10:46:37,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 10:46:37,472 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:37,472 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:37,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:37,686 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:37,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:37,687 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2020-07-20 10:46:37,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:37,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345415940] [2020-07-20 10:46:37,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:37,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:37,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 10:46:37,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 10:46:37,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:38,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:38,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:38,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 10:46:38,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345415940] [2020-07-20 10:46:38,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:38,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2020-07-20 10:46:38,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486652391] [2020-07-20 10:46:38,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 10:46:38,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:38,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 10:46:38,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-07-20 10:46:38,226 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 17 states. [2020-07-20 10:46:38,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:38,510 INFO L93 Difference]: Finished difference Result 39 states and 56 transitions. [2020-07-20 10:46:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 10:46:38,510 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-07-20 10:46:38,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:38,513 INFO L225 Difference]: With dead ends: 39 [2020-07-20 10:46:38,513 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 10:46:38,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-07-20 10:46:38,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 10:46:38,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-20 10:46:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 10:46:38,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 51 transitions. [2020-07-20 10:46:38,527 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 51 transitions. Word has length 28 [2020-07-20 10:46:38,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:38,527 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 51 transitions. [2020-07-20 10:46:38,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 10:46:38,527 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 51 transitions. [2020-07-20 10:46:38,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 10:46:38,530 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:38,530 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:38,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:38,736 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:38,737 INFO L82 PathProgramCache]: Analyzing trace with hash -928122994, now seen corresponding path program 2 times [2020-07-20 10:46:38,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:38,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646237929] [2020-07-20 10:46:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:38,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:38,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 10:46:38,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 10:46:38,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 10:46:39,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646237929] [2020-07-20 10:46:39,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:39,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-07-20 10:46:39,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265634147] [2020-07-20 10:46:39,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 10:46:39,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:39,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 10:46:39,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-07-20 10:46:39,047 INFO L87 Difference]: Start difference. First operand 34 states and 51 transitions. Second operand 11 states. [2020-07-20 10:46:39,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:39,235 INFO L93 Difference]: Finished difference Result 68 states and 116 transitions. [2020-07-20 10:46:39,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 10:46:39,236 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-20 10:46:39,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:39,239 INFO L225 Difference]: With dead ends: 68 [2020-07-20 10:46:39,240 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 10:46:39,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-07-20 10:46:39,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 10:46:39,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-07-20 10:46:39,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 10:46:39,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2020-07-20 10:46:39,264 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 41 [2020-07-20 10:46:39,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:39,265 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2020-07-20 10:46:39,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 10:46:39,265 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2020-07-20 10:46:39,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 10:46:39,268 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:39,268 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:39,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:39,473 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:39,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:39,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1952548262, now seen corresponding path program 2 times [2020-07-20 10:46:39,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:39,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780603697] [2020-07-20 10:46:39,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:39,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 10:46:39,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:46:39,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:46:39,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780603697] [2020-07-20 10:46:39,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:46:39,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 10:46:39,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909440712] [2020-07-20 10:46:39,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 10:46:39,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:39,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 10:46:39,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 10:46:39,540 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 6 states. [2020-07-20 10:46:39,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:39,664 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2020-07-20 10:46:39,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 10:46:39,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-07-20 10:46:39,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:39,667 INFO L225 Difference]: With dead ends: 62 [2020-07-20 10:46:39,670 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 10:46:39,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-20 10:46:39,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 10:46:39,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-20 10:46:39,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 10:46:39,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-07-20 10:46:39,683 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 40 [2020-07-20 10:46:39,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:39,684 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-07-20 10:46:39,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 10:46:39,684 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-07-20 10:46:39,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 10:46:39,690 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:39,690 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:39,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:39,907 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:39,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:39,908 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 3 times [2020-07-20 10:46:39,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:39,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552513476] [2020-07-20 10:46:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:39,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 10:46:39,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 10:46:39,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:40,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:40,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 10:46:40,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552513476] [2020-07-20 10:46:40,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:40,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 10:46:40,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3577449] [2020-07-20 10:46:40,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 10:46:40,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:40,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 10:46:40,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-20 10:46:40,271 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 11 states. [2020-07-20 10:46:40,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:40,413 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2020-07-20 10:46:40,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 10:46:40,414 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-20 10:46:40,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:40,415 INFO L225 Difference]: With dead ends: 57 [2020-07-20 10:46:40,416 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 10:46:40,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-07-20 10:46:40,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 10:46:40,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 10:46:40,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 10:46:40,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-07-20 10:46:40,428 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 41 [2020-07-20 10:46:40,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:40,429 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-07-20 10:46:40,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 10:46:40,429 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-07-20 10:46:40,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 10:46:40,433 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:40,433 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:40,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:40,641 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:40,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:40,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 4 times [2020-07-20 10:46:40,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:40,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532524067] [2020-07-20 10:46:40,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:40,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 10:46:40,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 10:46:40,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:41,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:41,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:41,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:41,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:41,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:41,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:41,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:41,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:41,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:41,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:41,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 10:46:41,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532524067] [2020-07-20 10:46:41,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:41,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2020-07-20 10:46:41,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905184017] [2020-07-20 10:46:41,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 10:46:41,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:41,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 10:46:41,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-07-20 10:46:41,572 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 23 states. [2020-07-20 10:46:41,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:41,991 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2020-07-20 10:46:41,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 10:46:41,993 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2020-07-20 10:46:41,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:41,994 INFO L225 Difference]: With dead ends: 51 [2020-07-20 10:46:41,995 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 10:46:41,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 10:46:41,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 10:46:42,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-07-20 10:46:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 10:46:42,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2020-07-20 10:46:42,006 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 42 [2020-07-20 10:46:42,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:42,007 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2020-07-20 10:46:42,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 10:46:42,008 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2020-07-20 10:46:42,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-20 10:46:42,009 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:42,009 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:42,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:42,223 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:42,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:42,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1434057987, now seen corresponding path program 5 times [2020-07-20 10:46:42,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:42,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085786112] [2020-07-20 10:46:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:42,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 10:46:42,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 72 proven. 104 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-07-20 10:46:42,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:42,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:42,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:42,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 72 proven. 107 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-07-20 10:46:42,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085786112] [2020-07-20 10:46:42,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:42,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 10:46:42,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258334861] [2020-07-20 10:46:42,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 10:46:42,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:42,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 10:46:42,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 10:46:42,828 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand 13 states. [2020-07-20 10:46:43,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:43,060 INFO L93 Difference]: Finished difference Result 88 states and 136 transitions. [2020-07-20 10:46:43,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 10:46:43,061 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 83 [2020-07-20 10:46:43,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:43,063 INFO L225 Difference]: With dead ends: 88 [2020-07-20 10:46:43,063 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 10:46:43,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 145 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-07-20 10:46:43,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 10:46:43,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-07-20 10:46:43,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 10:46:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2020-07-20 10:46:43,084 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 83 [2020-07-20 10:46:43,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:43,085 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2020-07-20 10:46:43,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 10:46:43,085 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2020-07-20 10:46:43,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-20 10:46:43,086 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:43,087 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:43,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:43,288 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:43,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:43,289 INFO L82 PathProgramCache]: Analyzing trace with hash -168777920, now seen corresponding path program 6 times [2020-07-20 10:46:43,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:43,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779191998] [2020-07-20 10:46:43,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:43,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 10:46:43,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 106 proven. 170 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2020-07-20 10:46:43,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:43,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:43,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:44,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:44,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:44,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 106 proven. 182 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-07-20 10:46:44,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779191998] [2020-07-20 10:46:44,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:44,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 10:46:44,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15670592] [2020-07-20 10:46:44,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 10:46:44,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:44,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 10:46:44,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 10:46:44,313 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 17 states. [2020-07-20 10:46:44,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:44,757 INFO L93 Difference]: Finished difference Result 106 states and 164 transitions. [2020-07-20 10:46:44,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 10:46:44,757 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-07-20 10:46:44,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:44,760 INFO L225 Difference]: With dead ends: 106 [2020-07-20 10:46:44,760 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 10:46:44,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 169 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-07-20 10:46:44,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 10:46:44,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2020-07-20 10:46:44,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 10:46:44,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 84 transitions. [2020-07-20 10:46:44,772 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 84 transitions. Word has length 97 [2020-07-20 10:46:44,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:44,773 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 84 transitions. [2020-07-20 10:46:44,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 10:46:44,773 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 84 transitions. [2020-07-20 10:46:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-20 10:46:44,774 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:44,775 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 8, 8, 8, 8, 8, 8, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:44,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:44,981 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:44,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:44,982 INFO L82 PathProgramCache]: Analyzing trace with hash -680629368, now seen corresponding path program 7 times [2020-07-20 10:46:44,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:44,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754152102] [2020-07-20 10:46:44,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:45,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:45,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 10:46:45,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 197 proven. 279 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2020-07-20 10:46:45,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:45,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:45,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:46,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:46,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:46,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:46,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:46,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:46,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:46,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:46,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:46,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 197 proven. 306 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2020-07-20 10:46:46,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754152102] [2020-07-20 10:46:46,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:46,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 10:46:46,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620816913] [2020-07-20 10:46:46,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 10:46:46,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:46,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 10:46:46,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 10:46:46,635 INFO L87 Difference]: Start difference. First operand 60 states and 84 transitions. Second operand 21 states. [2020-07-20 10:46:47,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:47,222 INFO L93 Difference]: Finished difference Result 130 states and 222 transitions. [2020-07-20 10:46:47,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 10:46:47,224 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 124 [2020-07-20 10:46:47,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:47,226 INFO L225 Difference]: With dead ends: 130 [2020-07-20 10:46:47,226 INFO L226 Difference]: Without dead ends: 79 [2020-07-20 10:46:47,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 211 SyntacticMatches, 17 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 10:46:47,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-20 10:46:47,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-07-20 10:46:47,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 10:46:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2020-07-20 10:46:47,239 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 124 [2020-07-20 10:46:47,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:47,239 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2020-07-20 10:46:47,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 10:46:47,240 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2020-07-20 10:46:47,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-07-20 10:46:47,242 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:47,242 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:47,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:47,455 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:47,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:47,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1288458278, now seen corresponding path program 8 times [2020-07-20 10:46:47,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:47,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618294462] [2020-07-20 10:46:47,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:47,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 10:46:47,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 453 proven. 734 refuted. 0 times theorem prover too weak. 1054 trivial. 0 not checked. [2020-07-20 10:46:47,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:48,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:49,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:49,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:49,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:49,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:49,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:50,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:50,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:50,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:50,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:50,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 453 proven. 782 refuted. 0 times theorem prover too weak. 1006 trivial. 0 not checked. [2020-07-20 10:46:50,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618294462] [2020-07-20 10:46:50,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:50,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-20 10:46:50,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204293151] [2020-07-20 10:46:50,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 10:46:50,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:50,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 10:46:50,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-20 10:46:50,255 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand 25 states. [2020-07-20 10:46:51,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:51,091 INFO L93 Difference]: Finished difference Result 157 states and 259 transitions. [2020-07-20 10:46:51,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 10:46:51,096 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 205 [2020-07-20 10:46:51,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:51,098 INFO L225 Difference]: With dead ends: 157 [2020-07-20 10:46:51,098 INFO L226 Difference]: Without dead ends: 94 [2020-07-20 10:46:51,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 365 SyntacticMatches, 21 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=539, Invalid=1531, Unknown=0, NotChecked=0, Total=2070 [2020-07-20 10:46:51,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-20 10:46:51,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2020-07-20 10:46:51,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-20 10:46:51,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 112 transitions. [2020-07-20 10:46:51,111 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 112 transitions. Word has length 205 [2020-07-20 10:46:51,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:51,112 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 112 transitions. [2020-07-20 10:46:51,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 10:46:51,112 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 112 transitions. [2020-07-20 10:46:51,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-07-20 10:46:51,114 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:51,114 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:51,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:51,323 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:51,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:51,324 INFO L82 PathProgramCache]: Analyzing trace with hash 375112636, now seen corresponding path program 9 times [2020-07-20 10:46:51,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:51,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184690] [2020-07-20 10:46:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:51,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 65 conjunts are in the unsatisfiable core [2020-07-20 10:46:51,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 258 proven. 604 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2020-07-20 10:46:51,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:52,888 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 10:46:53,018 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 10:46:53,160 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 10:46:53,305 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 10:46:53,987 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-20 10:46:54,254 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-20 10:46:54,526 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-07-20 10:46:54,794 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-07-20 10:46:57,169 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 10:46:57,302 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 10:46:57,445 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 10:46:57,587 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 10:46:58,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:58,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:58,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:59,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:59,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:59,902 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 10:47:00,108 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 10:47:00,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:00,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:00,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:00,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:00,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:00,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:00,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:00,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:00,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:01,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 207 proven. 695 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2020-07-20 10:47:01,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184690] [2020-07-20 10:47:01,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:47:01,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 35] total 48 [2020-07-20 10:47:01,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599267875] [2020-07-20 10:47:01,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-20 10:47:01,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:47:01,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-20 10:47:01,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1962, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 10:47:01,614 INFO L87 Difference]: Start difference. First operand 84 states and 112 transitions. Second operand 48 states. [2020-07-20 10:47:02,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:47:02,741 INFO L93 Difference]: Finished difference Result 90 states and 121 transitions. [2020-07-20 10:47:02,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 10:47:02,742 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 178 [2020-07-20 10:47:02,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:47:02,743 INFO L225 Difference]: With dead ends: 90 [2020-07-20 10:47:02,744 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 10:47:02,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 268 SyntacticMatches, 41 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2291 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=658, Invalid=4034, Unknown=0, NotChecked=0, Total=4692 [2020-07-20 10:47:02,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 10:47:02,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 10:47:02,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 10:47:02,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 10:47:02,747 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 178 [2020-07-20 10:47:02,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:47:02,747 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 10:47:02,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-20 10:47:02,747 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 10:47:02,747 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 10:47:02,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:02,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 10:47:03,407 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 7 [2020-07-20 10:47:03,760 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 19 [2020-07-20 10:47:03,764 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-20 10:47:03,764 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-07-20 10:47:03,764 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2020-07-20 10:47:03,765 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-20 10:47:03,765 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (and (<= 1 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 |fibonacci_#in~n|) (or (and (<= 2 |fibonacci_#t~ret0|) (< |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 5))) (<= |fibonacci_#in~n| 3)) (<= fibonacci_~n |fibonacci_#in~n|)) [2020-07-20 10:47:03,765 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-20 10:47:03,766 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-07-20 10:47:03,766 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-07-20 10:47:03,766 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-07-20 10:47:03,766 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 10:47:03,766 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 10:47:03,766 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 10:47:03,766 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 10:47:03,766 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 10:47:03,766 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 10:47:03,767 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2020-07-20 10:47:03,767 INFO L268 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2020-07-20 10:47:03,767 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-07-20 10:47:03,767 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-07-20 10:47:03,767 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-07-20 10:47:03,767 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-07-20 10:47:03,767 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2020-07-20 10:47:03,767 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2020-07-20 10:47:03,768 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-07-20 10:47:03,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:47:03 BoogieIcfgContainer [2020-07-20 10:47:03,773 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 10:47:03,775 INFO L168 Benchmark]: Toolchain (without parser) took 29120.47 ms. Allocated memory was 143.7 MB in the beginning and 424.1 MB in the end (delta: 280.5 MB). Free memory was 101.3 MB in the beginning and 263.2 MB in the end (delta: -161.9 MB). Peak memory consumption was 118.6 MB. Max. memory is 7.1 GB. [2020-07-20 10:47:03,775 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 143.7 MB. Free memory is still 119.4 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 10:47:03,776 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.61 ms. Allocated memory is still 143.7 MB. Free memory was 100.9 MB in the beginning and 91.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. [2020-07-20 10:47:03,777 INFO L168 Benchmark]: Boogie Preprocessor took 119.25 ms. Allocated memory was 143.7 MB in the beginning and 201.3 MB in the end (delta: 57.7 MB). Free memory was 91.5 MB in the beginning and 179.7 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 10:47:03,777 INFO L168 Benchmark]: RCFGBuilder took 248.05 ms. Allocated memory is still 201.3 MB. Free memory was 179.7 MB in the beginning and 167.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-07-20 10:47:03,778 INFO L168 Benchmark]: TraceAbstraction took 28469.96 ms. Allocated memory was 201.3 MB in the beginning and 424.1 MB in the end (delta: 222.8 MB). Free memory was 166.8 MB in the beginning and 263.2 MB in the end (delta: -96.3 MB). Peak memory consumption was 126.5 MB. Max. memory is 7.1 GB. [2020-07-20 10:47:03,781 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 143.7 MB. Free memory is still 119.4 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 277.61 ms. Allocated memory is still 143.7 MB. Free memory was 100.9 MB in the beginning and 91.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.25 ms. Allocated memory was 143.7 MB in the beginning and 201.3 MB in the end (delta: 57.7 MB). Free memory was 91.5 MB in the beginning and 179.7 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 248.05 ms. Allocated memory is still 201.3 MB. Free memory was 179.7 MB in the beginning and 167.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 28469.96 ms. Allocated memory was 201.3 MB in the beginning and 424.1 MB in the end (delta: 222.8 MB). Free memory was 166.8 MB in the beginning and 263.2 MB in the end (delta: -96.3 MB). Peak memory consumption was 126.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 27.5s, OverallIterations: 13, TraceHistogramMax: 29, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 258 SDtfs, 912 SDslu, 1279 SDs, 0 SdLazy, 2259 SolverSat, 1125 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1912 GetRequests, 1478 SyntacticMatches, 127 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3565 ImplicationChecksByTransitivity, 5.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 45 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 167 PreInvPairs, 212 NumberOfFragments, 42 HoareAnnotationTreeSize, 167 FomulaSimplifications, 434 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 1548 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 18.8s InterpolantComputationTime, 935 NumberOfCodeBlocks, 935 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 1778 ConstructedInterpolants, 0 QuantifiedInterpolants, 541358 SizeOfPredicates, 78 NumberOfNonLiveVariables, 2113 ConjunctsInSsa, 207 ConjunctsInUnsatCore, 23 InterpolantComputations, 3 PerfectInterpolantSequences, 7005/11113 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...